Journal Articleshttp://repository.rmutp.ac.th:80/handle/123456789/852015-03-03T18:51:16Z2015-03-03T18:51:16ZDrying of ground fish slices using superheated steamสอาดโฉม, ภูมิใจสวัสดิ์เสวี, ธนิตถมทอง, ทัศนะสมุททารินทร์, ปฏิพลโสภณรณฤทธิ์, สมชาติhttp://repository.rmutp.ac.th:80/handle/123456789/13402015-01-29T06:54:15Z2014-07-09T00:00:00ZDrying of ground fish slices using superheated steam
สอาดโฉม, ภูมิใจ; สวัสดิ์เสวี, ธนิต; ถมทอง, ทัศนะ; สมุททารินทร์, ปฏิพล; โสภณรณฤทธิ์, สมชาติ
Superheated steam drying has gained more attention due to its absence of oxidative reactions and high drying rate. This research involved drying of ground fish slices using superheated steam. The influences of superheated steam temperature (120, 130 and 140 ?C) and thickness of ground fish slices (1.3 and 2.2 mm) on drying kinetics and quality attributes of dried fish slices were studied. Effective moisture diffusion coefficients (Deff) of the ground fish slices dried at different conditions were also
investigated. From the experimental results, it was seen that an increase in drying temperature and a decrease in thickness of ground fish slices led to faster moisture reduction. In terms of qualities, it was found that the lightness value (L-value) decreased. However, the redness value (a-value), percentage of shrinkage, hardness and toughness values increased when the thickness of ground fish slices and superheated steam temperature increased. Moreover, it was also found that the Deff of the ground fish slices increased with
the increase of superheated steam temperature and thickness of ground fish slice.
วารสารวิชาการและวิจัย มทร.พระนคร, 7(2) : 74-86
2014-07-09T00:00:00ZResearch and Technology Transfer of salt producing chimney stove for ban bo luang community, bo kluea district, Nan Provinceศรีอุดม, ยุธนากระจ่างธิมาพร, เอกณัฏฐ์http://repository.rmutp.ac.th:80/handle/123456789/13392015-01-29T06:57:46Z2014-07-09T00:00:00ZResearch and Technology Transfer of salt producing chimney stove for ban bo luang community, bo kluea district, Nan Province
ศรีอุดม, ยุธนา; กระจ่างธิมาพร, เอกณัฏฐ์
This research aims to test and compare thermal efficiency of salt producing stoves between traditional stove and chimney stove, as well as transfer the technology to community. The traditional stove was constructed from clay while the chimney stove was formed by two layers of bricks coating with
cement and then filled with carbonized rice husk ash in the 3cm-space between the layers, in order to reduce heat loss. Both types of stoves could accommodate 2 pans. Results showed that the traditional and chimney stoves had thermal efficiencies of 13.1% and 16.4%, respectively. Thermal efficiency of the
chimney stove increased by 3.3% and led to reduction of average firewood consumption rate by 12–15Kg/day from the average consumption of 259Kg/day. As a result, the chimney stove could reduce costs of firewood by 14.4 baht/day. The chimney stove had production costs of 1,545 baht/unit and ROI period of
107 days. At present, 3 of 17 traditional stoves were improved into chimney stove.
วารสารวิชาการและวิจัย มทร.พระนคร, 7(2) : 97-106
2014-07-09T00:00:00ZAbrasive wear behavior of diffusion layer by Pack Cementation on low carbon steelRittipuakdee, Supornlee, sukangkanaPianthong, NalinMeemonglol, Napisphonhttp://repository.rmutp.ac.th:80/handle/123456789/13342015-01-29T06:59:28Z2014-07-09T00:00:00ZAbrasive wear behavior of diffusion layer by Pack Cementation on low carbon steel
Rittipuakdee, Suporn; lee, sukangkana; Pianthong, Nalin; Meemonglol, Napisphon
This research aims to study abrasive wear behavior of diffusion layer by pack cementation on low carbon steel. Chemical compositions of pack cementation include 42wt% Ferro-silicon,
17wt% sand, 3wt% NH4Cl, 12wt% clay, and 26wt% Liquid glass. The specimens were heated in the induction furnace at 950?C and 1050?C for 20 and 30 hrs. Microstructure of diffusion layer
was analyzed with Optical and Scanning Electron Microscopy and hardness of diffusion layer was tested with a Vickers indenter. The abrasive wear tests were carried out in a Dry Sand Rubber
Wheel abrasion machine according to ASTM G65 standard. Results showed that the heating temperature of 1050?C for 20 hrs. yielded high hardness level of approximately 394.26HV0.02
and low average wear resistance of 0.0751g. The worn surface exhibited deep grooves. On the other hand, the heated treatment for 30 hrs. yielded the highest diffusion layer of approximately 910?m and the microstructure of Fe5Si3, ?1 and ?Fe.
วารสารวิชาการและวิจัย มทร.พระนคร, 7(2) : 12-23
2014-07-09T00:00:00ZDrying of ground fish slices using superheated steam combined with hot airกัลยางาม, คมกริชสอาดโฉม, ภูมิใจสวัสดิ์เสวี, ธนิตhttp://repository.rmutp.ac.th:80/handle/123456789/13312015-01-29T07:00:18Z2014-07-08T00:00:00ZDrying of ground fish slices using superheated steam combined with hot air
กัลยางาม, คมกริช; สอาดโฉม, ภูมิใจ; สวัสดิ์เสวี, ธนิต
The objectives of this research were to study the changes in the moisture of ground fish slices during drying with superheated steam combined with hot air, and to compare the physical properties (in terms of color, hardness, toughness and shrinkage) as well as sensory evaluation of dried fish slices. Two drying methods were performed (i.e., superheated steam drying at 140 ?C combined with hot air drying at 110 ?C (SSD+HAD), and hot air drying at 110 ?C combined with superheated steam drying at 220 ?C and hot air drying at 110 ?C (HAD+SSD+HAD)). The ground fish samples were produced at sizes of 50?50?1.3 and50?50?2.2 mm (WDH). The samples with the initial moisture content of around 205-215% dry basis were dried until the final moisture content of about 20% dry basis. Results showed that the samples with 1.3 mm thickness had shorter drying times than those with 2.2 mm thickness. The samples dried by SSD+HAD and HAD+SSD+HAD were similar in the drying time. In term of qualities, it was seen that the lightness of dried samples decreased, but the hardness, toughness, and shrinkage percentage of dried samples increased when the samples thickness increased. Dried samples obtained from SSD+HAD had higher lightness, hardness and toughness, but had lower percentage of shrinkage than those obtained from HAD+SSD+HAD. Moreover, it was found that dried samples obtained from HAD+SSD+HAD had the highest sensory scores.
วารสารวิชาการและวิจัย มทร.พระนคร, 8(1) : 51-63
2014-07-08T00:00:00ZDevelopment of monitoring system for mobile weather stationวัจนเทพินทร์, นภัทรสมบูรณ์กิจ, ปกรณ์http://repository.rmutp.ac.th:80/handle/123456789/13252015-01-29T07:02:18Z2014-07-08T00:00:00ZDevelopment of monitoring system for mobile weather station
วัจนเทพินทร์, นภัทร; สมบูรณ์กิจ, ปกรณ์
The objective of this research was to develop a high performance monitoring software for extended database of mobile weather station by using embedded computer. The monitoring system could measure and record temperature, relative humidity, wind speed and direction, rainfall, solar radiation and UV index. The software could convert these parameters and sent them from mobile unit to base unit within 60meters distance via 868.0MHz of radio frequency. The embedded computer was used as for database and host of the monitoring software. This software was developed by using LabVIEW with large MySQL database. The software could work perfectly. That is, it could monitor and display any parameter in real time in both graphic and numerical data. It could also produce a report in correct format of research information. The Monitor system could work with the embedded computer. The mobile weather station could be used in remote areas with photovoltaic energy system and storage battery specially designed for them.
วารสารวิชาการและวิจัย มทร.พระนคร, 8(1) : 13-23
2014-07-08T00:00:00ZTwo-dimensional transient model for prediction of temperature profile at heat pipe wallศิริวรรณ, นรินทร์กาญจนวนิชกุล, เกียรติสินชมพูคำ, ธีรพัฒน์ฤทธิเดช, สัมพันธ์http://repository.rmutp.ac.th:80/handle/123456789/13242015-01-29T07:02:36Z2014-07-08T00:00:00ZTwo-dimensional transient model for prediction of temperature profile at heat pipe wall
ศิริวรรณ, นรินทร์; กาญจนวนิชกุล, เกียรติสิน; ชมพูคำ, ธีรพัฒน์; ฤทธิเดช, สัมพันธ์
Distribution trend of transient temperature profile of copper heat pipe from the start-up of outer wall temperature of evaporator section until the temperature was steady was studied. A two-dimensional model used numerical solution which based on finite difference method. The transient temperature distributions measured in all 3 heat pipe sections were compared with results from the numerical solution of the two-dimensional model that utilized the concept of temperature distribution in the pipe wall during transient operation. Results showed that the experimental trend and the theoretically predicted temperature profiles were similar. Moreover, there was good agreement when compared with the numerical simulation of Mistry et al. (2010). Therefore, the numerical-validated heat pipe temperature distributions were successfully simulated in a two-dimensional model.
วารสารวิชาการและวิจัย มทร.พระนคร, 8(1) : 24-38
2014-07-08T00:00:00ZKansei engineering: product development methodologyทองรักษ์, อภิชฎาสิทธิ์จงสถาพร, สุชาดาhttp://repository.rmutp.ac.th:80/handle/123456789/13202015-01-30T02:30:10Z2014-07-08T00:00:00ZKansei engineering: product development methodology
ทองรักษ์, อภิชฎา; สิทธิ์จงสถาพร, สุชาดา
Kansei engineering, or effective engineering, is an important product development methodology in which users’ or customers’ feelings and demands on the product are translated into important parameters for product design. On the other hand, effective engineering is an application of users’ opinion, mood and feelings in product design, which seems to guarantee that the product will meet the demand of customers. This idea was first developed in early 1970s in Japan. Now, it is widely used in both Asian countries such as Japan, Korea, Taiwan and European countries such as Sweden, Spain and France. It is widely used in various fields like applied science and psychological science. This paper discusses the application of Kansei engineering in various daily-used products in both Japanese and Western lifestyles. The perspectives presented in this article are based on the authors’ engineering knowledge.
วารสารวิชาการและวิจัย มทร.พระนคร, 8(1) : 197-204
2014-07-08T00:00:00ZTechnology transfer on construction and using biogas for household in ban tatongdang tak provinceศรีอุดม, ยุธนาเทวตา, อนุรัตน์http://repository.rmutp.ac.th:80/handle/123456789/11972015-02-09T08:31:09Z2013-08-16T00:00:00ZTechnology transfer on construction and using biogas for household in ban tatongdang tak province
ศรีอุดม, ยุธนา; เทวตา, อนุรัตน์
This research aimed to transfer technology of biogas construction for applying the biogas in household. The villagers were instructed and trained about digester construction
for applying the biogas produced from cow and pig manure. The produced biogas was used as alternative fuel for cooking in household to replace LPG. The research operation was separated
to 3 phases. the first was preparation and introduction. The second was instruction and practical training. The last was monitoring and project evaluation. The number of participants was 30. The number of biogas digester
pilot household was 10. From the project evaluation by using the five-rating scale questionnaire, it was found that the evaluation about cognition showed the maximun level (x=4.42, S.D. = 0.84). The second was about location, duration and food (X = 4.36,
S.D. = 0.75). The lowest was about knowledge application (X= 4.28, S.D. = 0.77). For the project evaluation of success, it was found that every biogas digester can be used and the produced biogas can be used to replace LPG about 1.8-2 hrs/a day/a housenold. They can save
the expenditure about 180-200 Baht/a month/a household. The biogas digester construction cost was about 3,000 Baht/a household. So, the payback period was 1.38 years.
วารสารวิชาการและวิจัย มทร.พระนคร, 7(1) : 138 -150
2013-08-16T00:00:00ZIntelligent tutoring system for web-based instructionChatwattana, Pinantahttp://repository.rmutp.ac.th:80/handle/123456789/11892015-02-09T07:59:44Z2013-08-16T00:00:00ZIntelligent tutoring system for web-based instruction
Chatwattana, Pinanta
The problem of learning ot the students is the instructor preparation the content or knowiedge transfer is not appropriate for the learning potential of indivedual students. This
article presents the implementation of intelligent tutoring systems that is response to the difference between the students and has been applied to the Web-Base Instruction by Combination of Adaptive content which is based
on Expert model within the ITS. This is a tools to support the learning of students according to their best potential and make learning more effective.
วารสารวิชาการและวิจัย มทร.พระนคร, 7(1) : 151 -158
2013-08-16T00:00:00ZContinuous variable compression ratio technology for next generation engineเจนภูมิศาสตร์, นนทวัจน์http://repository.rmutp.ac.th:80/handle/123456789/11872015-02-09T07:59:03Z2013-08-16T00:00:00ZContinuous variable compression ratio technology for next generation engine
เจนภูมิศาสตร์, นนทวัจน์
Continuous and Discontinuous (Stepwise) Variable compression Ratio Engine in one of the most widely acceptable methods in terms of efficiency and performance. Even though this. method was not new. it is still not ready for manufacturing due to many mechanical drawbacks,
such as heavy weight, high inertia force, heat accumulation, too many component parts, vibration, leakage of engine oil, high energy consumption, low precision, causes of problems for other part that work together, and high cost. Today, there are more than 250 patents worldwide
the relate to this systim. Thus, this paper presents the background of this technology, mechanism categories, analysis of strength and weakness, and summary of highest potential mechanism pattern for line production of new generation engines.
วารสารวิชาการและวิจัย มทร.พระนคร, 7(1) : 172-181
2013-08-16T00:00:00Z